The Principal Officers (2007-2008)
1. Prof. Joseph Funso Akingbade, FIOR (President/Chairman of Council)
2. Dr. Damian Ademulegun, FIOR (1st Vice-President)
3. Mallam Kashim Adebayo Raji, FIOR (2nd Vice-President)
4. Mrs. Joice Seido Kio, FIOR (Hon. Treasurer)
5. Chief Amadi Oziri Felix, FIOR (Ex-Officio I)
6. Engr. Sule Abdullahi,FIOR (Ex-Officio II)
7. Mallam AbdulFatai Oyeyemi Lawal, FIOR (Registrar/Chief Executive

The Principal Officers (2009-2010)

1. Prof. Joseph Funso Akingbade, FIOR (President/Chairman of Council)
2. Dr R. K. Ojikutu, FIOR (1st Vice-President)
3. Alh. Aliu Alabi Badmus, FIOR (2nd Vice-President)
4. Dr. (Mrs) Dixon Ogbechi Bolajoko, FIOR (Hon. Treasurer)
5. Chief Amadi Oziri Felix, FIOR (Ex-Officio I)
6. Mrs. Awojobi Adekemi, AFIOR (Ex-Officio II)
7. Mr. Adewoye Sunkanmi Olabode, FIOR (Ex-Officio III)
8. Mallam Abdul Fatai Oyeyemi Lawal, FIOR (Registrar/Chief Executive)

The Principal Officers (2011-2012)
1. Mallam Aliu Alabi Badmus, FIOR (President/Chairman of Council)
2. Engr.(Chief) Moses Abiodun Olowonisi, AFIOR (1st Vice-President)
3. Dr. Olusegun Olawale Adeleye, AFIOR (2nd Vice-President)
4. Mr. Johnson Funsho Baiyeri, AFIOR (Hon. Treasurer)
5. Mr. Olusegun Taiwo Opaleke, AFIOR (Ex-Officio I)
6. Dr.(Mrs.) Ruth Adunola Aderanti, AFIOR (Ex-Officio II)
7. Mr. Michael Kayode Olaniran, AIOR (Ex-Officio III)
8. Mallam AbdulFatai Oyeyemi Lawal, FIOR (Registrar/Chief Executive)